K29 – Gastritis and duodenitis

ICD-10-CM 2027 diagnosis code · Diseases of esophagus, stomach and duodenum

Non-billable header

ICD-10-CM code K29

Code: K29 (claims format: K29)
Description: Gastritis and duodenitis
Billable: No – use a more specific code below
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 11. Diseases of the digestive system (K00-K95)
Block: K20-K31 Diseases of esophagus, stomach and duodenum

Billable codes under K29

K29 is a header code and cannot be used on claims. Choose the most specific code:

K29.0 – Acute gastritisHeader (more codes below)
K29.2 – Alcoholic gastritisHeader (more codes below)
K29.3 – Chronic superficial gastritisHeader (more codes below)
K29.4 – Chronic atrophic gastritisHeader (more codes below)
K29.5 – Unspecified chronic gastritisHeader (more codes below)
K29.6 – Other gastritisHeader (more codes below)
K29.7 – Gastritis, unspecifiedHeader (more codes below)
K29.8 – DuodenitisHeader (more codes below)
K29.9 – Gastroduodenitis, unspecifiedHeader (more codes below)

Notes for K29

Excludes1 (not coded here):

eosinophilic gastritis or gastroenteritis (K52.81)
Zollinger-Ellison syndrome (E16.4)

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

Block K20-K31

Excludes2 (not included here):

hiatus hernia (K44.-)

Frequently asked questions

What is ICD-10 code K29?

K29 is the ICD-10-CM code for gastritis and duodenitis, in the block K20-K31 (Diseases of esophagus, stomach and duodenum).

Is K29 a billable code?

No. K29 is a header code with more specific child codes; report one of the billable codes listed above.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.